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Finding the Fourth Proportional to 161.78, 241.47 and 141.26

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Solution

The fourth proportional to 161.78, 241.47 and 141.26 is: 210.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.78 : 241.47 = 141.26 : x
  2. Step 2: Convert to fraction form
    161.78/241.47 = 141.26/x
  3. Step 3: Cross multiply
    161.78x = 241.47 × 141.26
  4. Step 4: Simplify right side
    161.78x = 34,109.35
  5. Step 5: Solve for x
    x = 34,109.35/161.78
  6. Step 6: Final answer
    x = 210.84

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.